The effect of IL-1 receptor antagonist on orthodontic tooth movement in mice.

MedLine Citation:

PMID:
22024406
Owner:
NLM
Status:
Publisher

Abstract/OtherAbstract:

OBJECTIVE: Orthodontic tooth movement (OTM) is achieved by alveolar bone remodelling induced by mechanical loading. Whilst interleukin-1 (IL-1) is directly involved in OTM, the role of interleukin-1 receptor antagonist (IL-1Ra), a naturally occurring IL-1 antagonist, is not completely defined. Therefore, the aim of this study was to investigate the effects of IL-1Ra on OTM. METHODS: An orthodontic appliance was placed in C57BL6 mice treated with vehicle or IL-1Ra (10mg/kg/day). OTM and TRAP-positive osteoclasts were evaluated after 12 days of mechanical loading and the levels of cytokines on periodontal tissues were analysed by ELISA after 12 and 72h. RESULTS: Mice treated with IL-1Ra showed diminished OTM and decreased numbers of TRAP-positive osteoclasts. In line with this, lower levels of IL-1β and TNF-α, and higher levels of IL-10, were observed on periodontal tissues of IL-1Ra-treated mice in relation to the vehicle-treated group. CONCLUSION: The present study suggests that IL-1Ra downregulates OTM, probably by its anti-inflammatory actions.